Nicomedia: Izmit, Turkey
Operational from circa 294 A.D. Finally closed under Leo I
| MN | MNA | MNB | MNG | MND | MNE | MNS | N | NA |
| NB | NG | ND | NE | NIC | NICO | NIK | NS | SMN |
| SMNA | SMNB | SMNG | SMND | SMNE | SMNS | SMNZ | SMNH | SMNI |
| MN | MNA | MNB | MNG | MND | MNE | MNS | N | NA |
| NB | NG | ND | NE | NIC | NICO | NIK | NS | SMN |
| SMNA | SMNB | SMNG | SMND | SMNE | SMNS | SMNZ | SMNH | SMNI |